Cutting and timing mechanism for wrapping machines



Jan; 17, 1928.

' J. DERRY CUTTING AND Trume uEcHANIsM' Fon wRAPPING mcuINEs Filed Feb. 2s, 1924 2 Sheetssheqt 2 FICA;

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INVEN'I'Y'; "s 7% w37 Y,

`Patented Jan. 17, 1928.

. UNITED staresl PATENTOFFICR N JASZPER DERBY, OF mnmromn, MASSACHUSETTS, Asistencia To ANDREW TER'KEDSEN, or BOSTON, MASSACHUSETTS.

CUTTING AND ATm'mcf MCHANSI Fon WRArrING MACHINES.

Application filed February 23, 1924. SerialiNo. 694,583.,m

This `invention :relates to wrapping machines of the general type shown and described in an application for Letters `Patent, filed `Tune 21, 1921, `by George W. Prouty, Serial'No. 479,410, patented June 16, 1925,

No. 1,542,474, and adapted primarily .for

wrapping annularobjects, such, for` example, as automobile tires, coils of wire, etcn A machine of this` type comprises a work supportby whichthe object to be wrapped is gradually turned, an annular shuttle which is rotated about the work as the latter is moved therethrough, areel or the like re movedtrom the shuttle for supplying to the latter wrapping material in the form of a continuous strlp which is Wrapped about the shuttle as the atter is rotated to wrap Said sti-ip about the work, and Ameans between the shuttle andthe source of supply for sev` ering the strip of wrapping material after a suiiicientquantity thereofI ,has been Wrapped upon the shuttle to` complete the wrapping o i a given object.

The present invention relates to the: cutting orsevering mechanism last referred to,

andhas forits objectto provide 4improved mechanism` of this character Vin which the cutting mechanism is automatically operated to sever thestripof wrapping material, the time of its operation being controlled by improved timing mechamsm. The several parts ot the cuttingand timing mechanism areso constructed and arranged that, the operator having once adjusted the measuring device to meet the requirements of the class oi'- workvbeing wrapped, no further manual operation is required,the cutting and timing mechanism being automatically reset, or returned to its initial. position, when the machine is stopped and against-arted to .begin successive wrapping operations.

further object of the invention isto pro Y vide improved means for operating the tension` device which Vcontrols the strip` of wrapping material remaining on the shuttle after thesame has been severed from the source of supply by the cutting mechanism. The tension device per se ,forms the `subject matter ot' a separate application for Letters Patent, tiled May 9, 1923, by'Jasper Derry, Serial No. 637 ,618, patented `JulyS, 1924, No. 1,500, s p

984. Improved connections are also provided for the reel brake mechanism, such, for example, as that described in another .appli-` cation for Letters Patent, filed May`9,1923. by Philip O. 'lengberg, Serial No. 637,681, patented April 22, `1924, No. 1,491,365. Boththe tensiondeviceand the reel brake are actuated by t-he cutting mechanism `when the latter operates to sever the strip of Wrapmg material.

lhe vforegoing and other objeetsof the` invention, together with meanswhereby the saine may bescarried into effect, will best be understood from the following description .of one form or embodiment thereof illustratcd in the accompanying drawings. It will be understood, however, that the particular construction described and shown has been chosen for illustrative piluposesmerely,I and that the invention, as defined by the claims hereunto appended, may be otherwise practiced without departure from its spirit` and scope.

In Said drawings Fig. 1 is` a front elevation ofthe complete 'machina showing the cutting mechanism in theposition assumed thereby at the beginning of the'wrapping operation.

Fig. 2 is anenlarged front elevation of the cutting and timing mechanism, showing the parts in the position 4they occupy after the strip has been cut.

Fig. 3 is a fra mentary view of the strip severing knives, t ie same being `viewed from the left in Fig. 1.

Fig. 4 is a vertical section taken substantially on the line 4-4, Fig. 2.

Fig, 5 is a section taken on line 5 5, Fig. 1, and showing the reel brake mechanism and means for operating the same.

Fig. 6 is a sect-ion taken on thek line 6-6,

Fig. 2.

he frame of the machine comprises a base-15 and a yoke16 which is pvotally mounted on a shaft 17 ,journalled in uprights 18 risingfrom the basel. The yoke 16 is porting the shuttle, form the driving means therefor. Said last named disks 19 are themselves driven by a driving member in the form of a large Vfriction disk 21 secured to the shaft 17 and Which, in turn, is driven by a friction disk 230 on the armature shaft of an electric motor 23. The motor is supported by a base 47 which may be lifted bodily, through connections generally indicated at 220, by a starting treadle 22, to engage the disk 230 with the. disk The tire or other work l to be Wrapped is held by a weighted roller 14`upon work support-- ing rollers (only one of which is shown inF ig. l) which are driven,` through con.

nections generally indicated at 25, from the motor 23, the arrangement being such that the work W Will be turned relatively slowly with respect to the speed of rotation of 'die shuttle 2O.v lIhe said shuttle is formed with a gap g through which the work JV may be inserted.l rllhe yoke V16 may be adjusted about the axis of the shaft 17 to centre the shuttle 20 with respect to annular objects of dill'erent sizes, said yoke being counterbalanced by a spring-27 and beingY locked in adjusted position by means of a clamp 28 on an up; right 29 rising from the base 15. The wrapping material, preferably in the form of a continuous strip S of pape-r, is supplied from a roll 30 supported by a reel (hereinafter referred to more in detail) carried by the yoke 16. Said paper passes from the roll 30 around guide rollers 31 and thence between fixed and movable knives 32 and 33 to the shuttle 20. face a circular series of rollers 34 about which the strip S is wrapped when the shuttle is rotated, said strip being fed from the shuttle to the work W. Mechanism for actuating the movable knife 33 to sever the strip S, when a sufhcfient length thereofrhas been wound around the shuttle, is located below thesaid knives and supported on a plate 35 carried by the yoke 16. Timing mechanism, likewise hereinafter more fully described, controls the operation of the cutting mechanism and determines the time at which the latter will be operated, said timing mechanism being manually adjustable in accordance with the size of the articles to be wrapped.

From the foregoing,'the purpose, relative location, andV function of the several instrumentalities of the machine will be sufficiently understood for the purpose of the present case. lith the exception of those hereinafter mentioned.` and in so far as the others enter into combination therewith, as pointed out in the claims, these parts form no portion of the present invention and may be of any suitable construction and arrangen'ient. 1

Referring now to the Figs. 1 to 4, the cutting and timing mechanism, now to be de- The said shuttlehas on one scribed, comprises the following construction and arrangement of parts. A vertical knifeactuating plunger 36 is longitudinally slidable in bosses 37 which project laterally from the plate 35, the latter' being secured to the yoke 16, as by bolts 35() passing through hollow spacing lugs 351 formed on said plate. The plunger' 36 is provided with ahead having a loop 39 projecting therefrom.

A compression spring 40 is positioned on the plunger 36 between ,the head 38 and the upper boss 37', and is of suiiicient strength to raise said plunger and its associated parts when the said plunger is free to move upwardly. A collar 4 is fixed to the plunger between the bosses 37, and is engaged, in the manner shown in Fig. 1, by one end of a horizontal timer shaft 2, thel engagement of the said parts serving to restrain the plunger 36 from upward move-- nient under the pressure of the spring 40. T he end of the plunger 36, below the lower boss 3i', has a slot 42 therein which receives the reduced end 43 of one arm 44 of a bell crank lever pivoted at 45 to the yoke 16 and the other arm 49 of which actuates the reel brake, as hereinafter described. The slot 42 is of a suitable shape to restrain the end 43 of the arm 44 against vertical movement with respect to the plunger 36 but permitting limited angular and horizontal movement between said parts. Intermediate its ends, the 'arm 44 has a lost mot-ion connection 48 with a link 46 pivoted to the movable motor base 47. f

Supported by the plate 35 isa bearing block 5() having a trunnion 51 by which said block is pivoted to said plate. Rotatably mounted in the bearing block 5() is the hollow hub 55() of an adjustable timing disk 55, said hub 'being held against axial movement in said block, as by means of a pin 551 engaginga circumferential groove therein. The horizontal timer shaft 2 is rotatablyV and slidably mounted in the hub 550 and has a worm gear 52 secured thereon (as by a set screw 53) adjacent the timing disk 55, which is disposed at the side of the bearing block opposite the plunger 36. The worm gear 52 is driven by a Worm 54 on the shaft 17 which carries the shuttle .driving disk 21 (see Fig. 1). The timing disk 55 is normally locked against rotation by a spring pressed plunger 56 slidably mounted in the block 50 and having its end formed to enter any one of a series of holes 57 in the said disk, said plunger having an operating handle 560 by which it may be withdrawn to permit the timing disk to be turned, lor adjusted angularly. Contact pins 58 and 59, formed with tapered or conical ends, pro- Vject, respectively, from the adjacent faces of the timing disk 55 and the worm gear 52 and are adapted to engage each other at any demechanism is as follows.

- Loslassesired point in the rotationof the shaft 2depending upon the' angular adjustmentof said disk. A `fixed collar 60 is secured tothe shaft 2between the bearing block 50 and plunger 36, and interposed between said collar and bearing block is a coiled combined torsion and, compression spring 61 which surrounds said shaft and has its ends securedin re` cesses inthe collar 60 and hub 55\0,.respec tively. The spring 61 acts in an axial direction to press the shaftA '2 toward the plunger 36, and also acts torsionally toreturn said shaft to its initial `or normal an-A gular position after it has been rotated. -A tension spring 62 is fastened at one end to a pin 63 on the plate 35 and'has its o posite end attached to a pin `3 projecting rom the block 50, said spring tending to rock the bearing block 50 on its trunnion 51 inthe direction to disengage the Worm gear 52 from the `worm 54. The pin 3 is engaged by a pin 64 projecting from the collar 60 to limit the rotation. of the shaft 2 under the niluence of the spring 61 and thereby tix the initial'or normal angular position of said shaft, said pin 3 engaging a pin 93 projecting from theV plate 35 to limit` the rocking movement of thebearing block 50y and shaft 2 under the influence of the spring 62.

The movable knife `33 is pivoted at 66`to the yoke 16, and the fixed knife 32 is secured, as by bolts 69, to a support 67` eX- tending from the said yoke. T'he free end of said movable knife has a reduced portion which is received in the loop 39 on the head 38 of the plunger 36, whereby said knife is actuated by said plungerwhen the latter is raised and lowered. r

The operation of the cutting and` timing Before `the Inachine is started, the timing disk 55 is angularly adjusted `and locked in adjusted posi tion by engagement ofthe plunger 56 inl` the proper hole 57, such adjustment separating the contact pins 58 and 59 anangulan distance which depends upon the amount of .Wrapping material required for the class of Work to e. Wrapped. The treadle 22 is then depressed by the operator, raising the motor base. 47, and thereby bringing .the friction disk 230 into driving engagement with the driving disk 211 to start the machine.`

rllhe link 46 rises with the motor base 47 and permits the lever 44 and plunger 36l to` rise slightly under the influence ofi `the spring 40. into the position shown iniFig. 1. The collar 4 on the plunger 36 is atthis time in engagement with the end of the hor-V timer shaft 2 is att-his time pressed toward theplunger 36 bythe spring 61. As the Wrapping operation progresses,the shaft 2` is slowly turned bythe Worm and worm gear until the pin 59 on the Worm gear engages the pin 58 on the timin disk 55.. Ens

The opposite end ofthe saidshaft 'is thus withdrawn. from engagement With the collar 4 on the plunger 36, and the latter is quick-` ly carried upward by `the spring 40 (see Fig. 2), thereby raising the movable knife 33 and severing the strip of Wrapping ma..` terial, `this movement being permitted by the lost motion connection between the arm 44 and link 46. At the same time, the bear inglblock 50 and the shaft 2 are turned, by the spring 62, about the trunnion 51, into the position shown` in'` Fig. 2, `being arrested by engagement of the pin 3 with the pin 93. The Worm gear 52 is thereby carried out of mesh With the Worm 54, so that the shaft 2, .being free to turn, is returned by the torsional action of the spring 61 toits starting position with the pin 64 in` engagement with the pin 3. lVhen the treadle 22 is released to stop the machine, the plunger 36 `is 4depressed by the link 46 and arm 44, permitting the shaft 2 to move to the left un,-` der the influence of the spring 61, so as to be againengaged by the collar 4, and thereby locking said plunger in depressed position. It Will thus be seen thatthe cutting and timing mechanism is automatically returnedlto its starting position after each successive wrapping operation, and that adjustment is only required when work of a different size is to be operated upon.

The tensioning device `referred to at the beginning of this specification consists of a lll() band. 75 securedto the yoke 16 by means of material:wrapped about the shuttle at the time the cutting mechanism is operated. It will be understood that the band 75, is brought into contact with the wrapping material S` which remains on the rollers 34 of the shuttle after the cutting mechanism Vhas lsevered said material from the `source of vsupply in order to hold said material 1n position and cause the `same to be applied to the work under the required tension.`

Referring to Figs. 2 and 6, 77- denotes a sleeve mounted on a bolt or stud 78 projecting from the plate 35 at a point adjacent the plunger 36. An arm 79, formed integral with the said sleeve, receives the end of the` tension bandi 7 5 in a slot 8() in the end of said arm.` Arms 81 extend from the sleeve lio 77 on opposite sides of the plunger. 36below a pin 8 which extends through' and projects in vopposite directions from said plunger. dien the plunger is released to sever the Wrapping materiahsaid pin, as it moves,upwardly with the plunger permits the sleeve 7 7 to be rotated in a 'clockwise direction by a torsion spring 83 which is Within the said sleeve and secured at opposite ends respectively to said sleeveand to a bushing 91 rotatably mounted in the end thereof. The bushing 91 may be turned tor adjust the tension of the spring 83, and is clamped in adjusted position by a nut 92 on sa-idstud. When the plunger 36 is depressed in stopping the machine, the pins 8 carry. the arms S1 downwardly, thereby releasing the tension band.-

The reel which carries the wrapping material herein referred to, comprises a sleeve 85 rotatably mounted on a stud 86 secured to theyoke 16, said reel having associated therewith a brake which prevents the unnecessary unwindiirql of the Wrapping material from the reel after the cutting mechanism has severed the said material. Said brake comprises co-operating cam members 87 and 88 mounted on the stud 86, the saidv members having complementary cam surfaces on their adjacent sides. The cam member S7 bears against the end of the sleeve 85 and has a limited movement with respect thereto, While-the member 88 is secured to the yoke 16 and is, therefore, fixed in relation to the stud 8G. The arm 49 is moved to the right in Fig. 1, when the plunger 36 rises to sever the strip S. The outer end 89 of the said arm is forked and embraces a pin 90 on the cam member 87, thereby moving said member so that its cam surface is caused to bear against the cam surface of the member 88, which is consequently pressed against the sleeve 85 so as to apply a braking action which resists further rotation of the said sleeve. The brake is released When the motor base 47 is lowered to stop the machine, the arm 49 being then moved to the left in Fig. 1.

vHaving thus described my invention, What I ciaim :is- Y 1. In a machine of the character described, in combination, mechanism for feeding a strip of wrapping material to the Work and Wrapping the same thereabout, means for relatively traversing the work and wrapping mechanism as the Wrapping progresses` means for cutting said strip, means tending normally to actu-ate said cutting means, and timing means controlled by the Wrapping operation of said wrapping mechanism for normally restraining said actuating means and for releasing the same at a pre` determined time.

2. In a machine of the character described,in combmation, mechanism for feeding a sti-ip of wrapping material to the Work' and wrapping thesame thereabout, means ping the same, mechanism for automatically.

cutting said strip at a predetermined time during the wrapping operation including a member moved from a fixed position, and means operated by said starting and stopping means for moving said member in the opposite direction to reset said cutting meehanism.

ff. In a machine of the character described, in combination, mechanism for feeding a strip of wrapping material to the Work and Wrapping the same thereabout, means for actuating said Wrapping mechanism including means for starting and stopping the same, a knife forV cutting said strip, means for controlling the time of operation of said knife, and means operated by said starting and stopping means for resetting said knife.

5. In a machine of the character described, in combination, mechanism for lfeeding a strip of wrapping material to the Work and Wrapping the same thereabout, means for actuating said Wrapping mechanism including means` for starting and stopping the same, a knife for cutting said strip, means for 'actuating said knife, timing means for restraining said Vactuating .means and for releasing the saine at a predetermined time, said timing means inclu ing a member progressively moved by said wrapping mechanism from a fixed position and an' adjustable timing :member toward which said first named-member is moved, means for returning said first named member to said fixed positionY when said knife actuating means is released, means operated by said starting and stopping means for resetti.ngsaid knifeV and knife actiuitiug means, and means for reengaging said restraining means andv actuating means when the latter reset.

6. In a Wrapping machine, in combination, mechanism for feeding a strip of Wrapping iaterial to' the work, cutting and timing mechanism co1i'ipri1-'1ing tto-operating knives, a plunger to actuate one of said knives, a spring to move said plunger, and a timer adapted to engage said plunger and disengage the same at a predetermined time.

iso

7. In a Wrapping machine, thecombinationwith mechanism for feeding a* strip of Wrapping material tothe Work, of cutting and timing mechanism comprising co-operating knives, a knife actuating plungera spring for actuating said plunger, and a timer including apivoted bearing block, a reciprocating timer shaft in said block, means for normally holding said shaft in engagement with said plunger, and means for moving said shaft from said engagement at a predetermined time. l

8. In a Wrapping machine, the combination With mechanism for feeding a strip of Wrapping material tothe Work, of cutting and timing mechanism comprising co-operating knives, a spring controlled knife actuating plunger, and a timer including a pivoted bearing block, a reciprocating timer shaft in said block, means for normally holding said shaft in engagement with said plunger,

means for rotating said sli-aft, adjustable co-operating means on said shaft and block, respectively, for moving said shaft from said engagement at a predetermined time, and means secured to said shaft for turning said bearing block about its pivot. t

9. In a wrapping machine, the combination with mechanism for feeding a strip of Wrapping material to the Work, of cutting and timing mechanism comprising co-operating knives, a springl controlled knife actuating plunger', and a timer including a pivoted bearing block, a timer shaft slidable in said block, a collar on said shaft, a spring interposed between said collar and block, said spring normally holding said shaft in engagement with said plunger, means for rotating said shaft, adjustable co-operating mea-ns on said shaft and block, respectively, for sliding said shaft from said engagement at a predetermined time, and means secured to said shaft for turning said bearing block on its pivot. i

10. In a wrapping machine, the combination with mechanism for feeding a strip of wrapping material to the Work, of cutting and timing mechanism comprisingco-operating knives, a spring controlled knife actuating plunger, and a timer including a pivoted bearing block, a. timer shaft slidable in said block, means for normally holding said shaft in engagement with said plunger, a Worm gear on said timer shaft, a driving shaft, a Worm thereon to drive said Worm gear and rotate said timer shaft, adjustable meanson said block for sliding said timer shaft from said engagement ata predetermined time in the ro'tationthereof` and means secured to said'tinie'r shaft for turning said block about its pivot.

1l. In a Wrapping machine, the combination with mechanism for feeding a strip of wrapping material to the Work, of cutting and timing mechanism comprising co-opervby said timer shaft for engagement with said lirst named pin for sliding said timer shaft from engagement with said knife actuating plunger at a predetermined time in the rotation of said timer shaft, and means for turning said bearing block about its pivot.

'12.` Infa wrapping machine, in combination, mechanism for feeding a strip of Wra' ping material to the work, cutting and timing mechanism comprising co-operating knives, a spring controlled knife actuating plunger and a timer including a pivoted bearing block, a reciprocating timer shaft in said block, means for normally holding said shaft in engagement with said plunger,` adjustable'comeans for rotating said shaft,

operating means on said shaft and block, re-

spectively, for sliding said shaft from saidl engagement at a predetermined time, means secured to said shaft for turning said block about its pivot, means operable to start and stop said machine, a link connected thereto, a lever, said link having a lost motion connectioii with said lever intermediate the ends of the latter, the free end of said lever being in engagement with said plunger, said lever and link serving to reset-.said plunger to permit the same to be engaged by said timer shaft when said starting and stopping means is operated to stop the machine.

18. In a wrapping machine, in combination, mechanism for feeding a strip of Wrapping material to t-he work, cutting and timing mechanism comprising co-operating knives, a-spring controlled knife actuating plunger, a timer controlling the time of actuation of the said plunger, a tensioning de- 'vicep for said Wrapping material after the same has been severed from the source of supply, a rotatable sleeve having a plurality of arms, one of said arms being connected to said tensioning device and the other engaging said knife actuating plunger Whereby said tensioning device is operated simultaneously with the said plunger.

14. In a wrapping machine, in combination, mechanism for feeding a strip of Wrapping material to the Work, cutting and timing mechanism comprising plunger, a timer controlling the actuation ofthe said plunger, a reel from Which said c j co-operating 1 knives, a spring controlled knife actuating wrapping material is fed, a brake for said reel, means operable to start and stop said machine, a link connected thereto, and a lever having an arm in slidable engagement 5 with the lower end of said knife actuating plunger and having a 10st motion connection intermediate its ends with said link, said lever having a second arm, operatively connected with said brake to apply the same when said knife actuating plunger is released 10 to sever the strip of wrapping material.

In testimony Whereo I aix my signature.

JASPER DERBY. 

